Happiness ~Koufuku Kangei!~ (ハピネス～幸福歓迎！～; Happiness ~Welcome Happiness!~) is Berryz Koubou's 4th single. It was released on August 25, 2004 in a Regular Edition (PKCP-5044). The Single V DVD (PKBP-5022) was released on September 8, 2004 and sold a total of 6,782 copies.

The B-side, "Yuujou Junjou oh Seishun", was used as the theme song for the movie Promise Land ~Clovers no Daibouken that Shimizu Saki, Tsugunaga Momoko, Tokunaga Chinami, and Natsuyaki Miyabi starred in.